2 - 5( 0,2m - 2z ) = 3( 3z + 2 ) + 2m
4( z - 2m ) - ( 2z + m ) = 2 - 2( 2z + m )
Решение
2 - m + 10z = 9z + 6 + 2m
4z - 8m - 2z - m = 2 - 4z - 2m
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10z - 9z = 6 + 2m - 2 + m
z = 3m + 4
2z - 9m = 2 - 4z - 2m
6z = 7m + 2
6( 3m + 4 ) = 7m + 2
18m + 24 = 7m + 2
11m = - 22
m = - 2
z = 3•( - 2 ) + 4 = - 2